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The LG ESS Smart Energy Consumption with the LG Energy Storage SystemThe LG Electronics ESS is a state-of-the-art energy management system designed to help small commercial enterprises manage their energy supply, reduce bills and contribute to a sustainable future. The LG ESS is offered in both an AC-coupled and DC-coupled confi guration. Both systems can provide backup power in case of an emergency. The 7.6kW DC-coupled solution with an integrated high-effi ciency PV inverter is well-suited for new solar PV + storage installations. The system will offer business owners greater control, effi ciency and reliability when it comes to their energy supply, both day and night. The 5kW AC-coupled solution is ideal for businesses looking to install an ESS with an existing PV system, or with no PV system at all. The system offers a cost-effective way to manage Time of Use (TOU) rates and Peak Shaving.
Product features include quick and easy installation, a compact and elegant design, and an integrated smart energy management system (EMS). The EMS enables businesses to control electric bills through self-consumption of solar and TOU rate smart scheduling, and includes an off-grid mode to protect the customer’s building in the event of a power outage.
The LG ESS is provided as an integrated energy storage system, complete with PCS, ATS and Energy Meter. In the case of a DC-coupled system, RSD will also be included. For either the AC- or DC-coupled system, a second battery pack is optional.
The LG ESS is offered as both an AC-coupled solution and a DC-coupled solution. The 7.6kW DC-coupled product offers unparalleled solar + storage performance, allowing business owners to seamlessly store excess solar energy to power their business both day and night. The 5kW AC-coupled product can be easily added to an existing PV system, offering a reliable and cost-effective way to manage Time of Use (TOU) rates and provide backup power.
Features at a glance
Easy Two-Person Installation High-Effi ciency PCSAll required components included for complete install, plus painless commissioning via Auto Self-Check
97.5% CEC Effi ciency, Multi-String options & MPPTs for multi-angled roofs
Extremely Reliable Battery; Scalable System Smart Energy Management and Remote System MonitoringUp to 19.6kWh for longer backup time;
Compatible with LG Chem RESU 10H Emergency Backup; 24/7 energy monitoring
One-stop Service & 10-Year Warranty Flexible InstallationESS can be paired with LG PV modules for a single provider for all warranty issues
DC-coupled or AC-coupled solution options to pair with a standard power grid, an existing PV system or a brand new PV system
Contact
Jan Dominguez | ESS Sales EngineerLG Electronics USA Inc.910 Sylvan Avenue, Englewood Cliffs, NJ 07632O : (201).408.9065 | M : (310).626.3427 | jan.dominguez@lge.com
Specifi cations
97.5%
10
DC 7.6kW
Main Panel
Main Panel
Protected Sub-Panel
Protected Sub-Panel
RS 485 communication
RS 485 communication
Auto-TX Switch Box
FiremanSwitch
Main Load
Protected Load
Protected Load
Energy Meter
Energy Meter
Split phase240V
3-String
RSD Box
AC Power DC Power Communication
AC Power DC Power CommunicationAC 5kW
Installation by mobile app.
Existing Solar System Or LG AC Module
Installation By mobile app.
Auto-TX Switch Box
FiremanSwitch
Main LoadSplit phase240V
LG ESS PCS Primary Battery Auto-Transfer Switch Energy Meter Rapid Shutdown Box for NEC 2014
Secondary Battery
PV inverter
Power Conversion System Battery Specifi cations
Dimensions (W*L*H) [mm]
Weight 20 kg/44 lbs
Cooling Natural Convection
Enclosure Material Aluminum Alloy
Installation TypeWall Mount, Horizontal support
Indoor and Outdoor
Enclosure Protection NEMA Type 4
Warranty 10 years
Mechanical Design
Indicator 5 LEDs
Protocol Modbus (SunSpec)
Ethernet (optional) Standard (IPv4, IP6 Supported)
Human Machine Interface (HMI)BLE (Support 4.0 or higher)
Settings can be done through APP from Mobile phone
Remote Diagnose/Monitoring Bi-direction Through Cloud
Remote Firmware Update Through Cloud (Optional)
Rapid Shutdown System Integrated
Interface
Rapid Shutdown Box - Offered by LG Electronics
Energy Meter Offered by LG Electronics
Auto-Transfer Switch Offered by LG Electronics
Accessories
Compatible Battery Pack Size 9.8 to 19.6 kWh @77°F(25°C ) Max. 2 in parallel
Rated I/O Power 5000 W 5000 W
Peak I/O Power(10 sec) 6000 W 7000 W
Acceptable Input Voltage Range Charge/Discharge : 400 ~ 450 V DC / 350 ~ 430 V DC
Rated I/O Current Max. Charge/Discharge Current : 11.9 A@420 V / 14.3 A@350 V
Peak I/O Current (10 sec) 18.9 A@370 V
Cycle Effi ciency Charging to Discharging (PCS Only)
Peak > 95 %
DC Disconnect Internal
Fuse Rating 30 A
Battery Terminal Screw Type
Battery Input / Output
LG AC 5kW LG DC 7.6kW
Model Name A005KEEN261. D007KEEN261.
Absolute Maximum Input Voltage
N/A
450 V DC
Start-up Voltage 120 V DC
Operational DC Voltage Range 50 ~ 450 V DC
Full Power MPPT Range 270 ~ 450 V DC
Maximum Current per MPPT 12 A DC
MPP Tracker 3
Maximum Allowable MPPT In-Parallel
2(String)
MPPT Scan (Shading Option)15min (high) / ~ 30min (default)
/ ~ 60min (low)Full range scan take less than 5s
MPPT Effi ciency>99.6% (Static),
>99.3% (Dynamic)
DC Disconnect Integrated
Input Terminal Spring Type
PV Input
Output Pure Sin-wave Voltage
Maximum Output Power 5000 W
Peak Output Power (10 sec) 6000 W
AC Output Voltage Range 240 V AC
Maximum AC current 21 A
Peak AC Current (10 sec) 25 A
Frequency Range 57 ~ 63 Hz
Voltage Harmonics Distortion @ 100% resistor load
THD < 5%
Maximum Allowed Crest Factor 2.5 @5000W
AC Output (Off-Grid Mode)
Safety Mark CSA
General Safety UL1741, CSA 22.2 No. 107-01
Software Safety UL1998
Grounding Fault Detection UL1741 CRD, NEC 2014 Article 690.35
Anti-Islanding Protection IEEE1547, IEEE1547.1
EMC FCC part 15 Class B
AFCI UL1699B (Type 1), NEC 2014 690.11
Integrated Meter ANSI C12.20 (meets 0.5% accuracy)
Grid Support Regulation California Rule 21 , HECO Compliant
Standards
Maximum Output Power 5000 VA 8000 VA
Grid Voltage Rangea) 240 V AC +10%/-12%, (L-L)b) 208 V AC +10%/-12%, (L-L)
Maximum AC Current 24 A AC 32 A AC
Frequency Range 57 ~ 63 Hz
Power Factor Cos phi = 0.85c~0.85i Adjustable
Harmonics Distortion TRD < 3%
Grid Support Compliance UL 1741 SA, CA Rule 21, HECO
RGM * Optional Built-in RGM
Output Terminal Spring Type
AC Output (On-Grid Mode)
* Complies with ANSI C12.20
LG PCS and Battery
Block diagram of LG PCS
Mechanical drawing and cable ports
MPPT1+MPPT1-MPPT2+MPPT2-MPPT3+MPPT3-
1+
DCDisconect
1- 2- 3- 4- 5- CAN BUSBAT+ BAT-
RS485 BLE Wi-Fi (Opt)
Zig Bee (Opt)
RevenueGradeMeter
N
NL2L1
L2L1
6-
2+ 3+ 4+ 5+ 6+
Kwh
PV
PV Battery DC Disconnect
AC Grid Communication & Antenna
Battery Commnuicatioin
Total Energy Capacity 9.8 kWh@25°C (77°F), 100% State of Energy
Usable Energy Capacity1) 9.3 kWh
Battery Capacity 63 Ah
Voltage RangeCharge 400 to 450 VDC
Discharge 350 to 430 VDC
Absolute Max. Voltage 520VDC
Max. Charge/Discharge Current 11.9A@420V / 14.3A@350V
Max. Charge/Discharge Power2) 5kW
Peak Power3) (only discharging) 7kW for 10 sec.
Peak Current (only discharging) 18.9A@370V for 10 sec.
Communication Interface RS485
DC Disconnect Circuit Breaker
Connection Method Spring-Type Connector
User Interface LEDs for Normal and Fault operation
Electrical Characteristics
Installation Location Indoor / Outdoor (Wall-Mounted)
Operating Temperature 14 to 113°F (-10 to 45°C)
Operating Temperature (Recommended) 59 to 86°F (15 to 30°C)
Storage Temperature -22 to 131°F (-30 to 55°C) -22 to 131°F (-30 to 55°C)
Humidity 5% to 95%
Altitude Max. 6,562ft (2,000m)
Cooling Strategy Natural Convection Natural Convection
Operating Conditions
SafetyCell UL1642
Battery Pack UL1973 / CE / RCM / TUV(IEC 62619)
Emissions FCC
Hazardous Materials Classifi cation Class 9
Transportation UN38.8
Ingress Rating IP 55
Certifi cation
* Test Conditions - Temperature 25°C, at the beginning of life.* Energy is measured under specifi c condition from LGC (0.3CCCV/0.3CC).1) Value for Battery Cell Only (Depth of Discharge 95%).2) LG Chem recommends 3kW for maximum battery lifetime.3) Peak Current excludes repeated short duration (less than 10 sec. of current pattern).
Battery ExpansionLG Energy Storage System can connect RESU 10H battery up to 2 each without additional battery expansion kit.
LG AC 5kW LG DC 7.6kW
Isolation Level Transformer-less
Type of Converter DC/AC
CEC Effi ciency N/A 97.50%
RTE
BAT -> GRID : 98.0% PV -> GRID : 98.5%
GRID -> BAT : 98.0% BAT -> GRID : 98.0%
GRID -> BAT : 98.0%
Operating Temperature -22 °F to 149 °F/ -30 ~ 65 �
De-rating Start Temp. Higher than 113F (45 �)
Humidity 0 ~95%
Maximum Operating Altitude 3000m above sea level De-rating above 2000m
Audible Noise < 40 dBA @ 1m
MTBF >500k hrs Calculated Acc. MIL Handbook
General PV to AC
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